CN111454581A - High-temperature-resistant asphalt formula and preparation method thereof - Google Patents
High-temperature-resistant asphalt formula and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the field of asphalt materials, in particular to a high-temperature-resistant asphalt formula and a preparation method thereof, wherein the asphalt formula comprises the following components in parts by weight: 100 parts of matrix asphalt, 3-8 parts of SBS, 2-10 parts of EVA, 3-6 parts of compatilizer, 2-8 parts of modifier and 1-5 parts of stabilizer. The invention solves the problem that the existing asphalt material has poor use effect in severe environment, and in addition, the preparation method for preparing the high-temperature-resistant asphalt has simple and convenient operation, does not need too much labor cost, and is suitable for industrial application.
Description
Technical Field
The invention relates to the field of asphalt materials, and particularly relates to a high-temperature-resistant asphalt formula and a preparation method thereof.
Background
Asphalt is a non-polymer material blend which has relatively small molecular weight and consists of a plurality of small molecular substances, is one of high-viscosity organic liquids, is in a liquid state, has a black surface and is soluble in carbon disulfide. Asphalt is a waterproof, moistureproof and anticorrosive organic cementing material. The asphalt can be mainly divided into coal tar asphalt, petroleum asphalt and natural asphalt: wherein, the coal tar pitch is a byproduct of coking; petroleum pitch is the residue of crude oil distillation; natural bitumen is stored underground, and some forms a mineral layer or is accumulated on the surface of the crust. The asphalt is mainly used in the industries of paint, plastics, rubber and the like and pavement and the like.
With the rapid development of society, road construction is listed as one of key projects for national development, and the selection of asphalt can directly influence the quality of roads. Because the asphalt has poor temperature resistance and aging resistance, the change of temperature has great influence on the performance of the asphalt, the asphalt is easy to soften or even melt at high temperature, and the asphalt is easy to become brittle or even crack at low temperature. Therefore, it is necessary to modify asphalt to improve and enhance its road-use performance for use in harsh environments.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a high temperature resistant asphalt formulation, which comprises the following components in parts by weight:
100 parts of matrix asphalt, 3-8 parts of SBS, 2-10 parts of EVA, 3-6 parts of compatilizer, 2-8 parts of modifier and 1-5 parts of stabilizer.
Preferably, the base asphalt is 70# or 90# heavy traffic asphalt.
Preferably, SBS is a linear styrene-butadiene block copolymer.
Preferably, the content of vinyl acetate in the EVA is 20-50%.
Preferably, the compatilizer is prepared by mixing natural phenol, phenolic resin and a solvent; wherein the mass ratio of the natural phenol to the phenolic resin to the solvent is 1: 0.05-0.1: 0.1-0.5.
Preferably, the natural phenol is one or more of anthocyan natural phenol, flavonoid natural phenol, phenolic acid natural phenol and resveratrol natural phenol; the solvent is one of benzene, toluene, xylene and trimethylbenzene.
Preferably, the modifier is a modified silicon-based microsphere.
Preferably, the stabilizer is selenate, in particular metal bismuth-doped vanadyl selenate.
More preferably, the modified silicon-based microspheres are obtained by graft polymerization of organic tantalum and silicon-based microspheres.
Preferably, the preparation method of the modified silicon-based microspheres comprises the following steps:
s1, weighing tantalum acetate, adding the tantalum acetate into N, N-dimethylformamide, stirring until the tantalum acetate is dissolved, adding palladium dichloride, stirring until the palladium dichloride is uniformly stirred, heating to 60-70 ℃, stirring at the speed of 200-300 rpm for 5-10 hours, and cooling to room temperature to obtain an organic tantalum solution;
wherein the mass ratio of the tantalum acetate to the palladium dichloride to the N, N-dimethylformamide is 1: 0.05-0.1: 10-15;
s2, weighing gamma- (methacryloyloxy) propyl trimethoxy silane, adding the gamma- (methacryloyloxy) propyl trimethoxy silane into deionized water, stirring at the speed of 500-1000 rpm for 0.5-3 h, then dropwise adding ammonia water with the mass concentration of 20%, continuously stirring at room temperature for 1-3 h, filtering to obtain a solid, washing with acetone for three times, then washing with deionized water for three times, and drying in vacuum to obtain the silicon-based microspheres;
wherein the mass ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the deionized water is 1: 15-20; the solid-to-liquid ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the ammonia water is 1: 0.2-0.5;
s3, weighing the silicon-based microspheres, adding the silicon-based microspheres into the organic tantalum solution, ultrasonically dispersing the silicon-based microspheres uniformly, adding 2,2' -azobis (2, 4-dimethylvaleronitrile), stirring the mixture for 3-5 hours in a water bath at the temperature of 60-80 ℃, cooling the mixture to room temperature, ultrasonically degassing, filtering the mixture to obtain a solid, washing the solid with acetone for three times, and drying the solid in vacuum to obtain modified silicon-based microspheres;
wherein the mass ratio of the 2,2' -azobis (2, 4-dimethylvaleronitrile) to the silicon-based microspheres is 1: 0.01-0.1; the solid-liquid ratio of the silicon-based microspheres to the organic tantalum solution is 1: 10-20.
More preferably, the preparation method of the stabilizer is as follows:
s1, weighing vanadyl oxalate, adding the vanadyl oxalate into deionized water, and stirring until the vanadyl oxalate is completely dissolved to obtain a vanadyl oxalate solution; adding bismuth chloride into the vanadyl oxalate solution, placing the solution in a water bath at 60-80 ℃, stirring for reaction for 2-5 h, and cooling to room temperature to obtain a mixed solution;
wherein the solid-to-liquid ratio of vanadyl oxalate to deionized water is 1: 5-20; the solid-to-liquid ratio of the bismuth chloride to the vanadyl oxalate solution is 1: 50-80;
s2, adding selenious acid into the liquid before mixing, stirring uniformly, adding hydrogen peroxide, stirring uniformly again, pouring into a reaction kettle with a polytetrafluoroethylene lining, heating to 80-100 ℃, reacting for 3-6 hours, filtering to obtain a solid, and washing with deionized water for three times to obtain bismuth-doped vanadium selenate;
wherein the solid-to-liquid ratio of the selenious acid to the liquid before mixing is 1: 10-30; the volume ratio of the hydrogen peroxide to the liquid before mixing is 1: 80-120.
Another object of the present invention is to provide a method for preparing high temperature resistant asphalt, comprising:
step 1, weighing the matrix asphalt according to the amount, adding the matrix asphalt into a stirrer, heating to 180-200 ℃, and stirring to a swelling state to obtain an asphalt swelling substance;
step 2, weighing a modifier according to the amount, adding the modifier into the asphalt swelling material, and stirring the mixture uniformly to obtain an asphalt modified material;
step 3, weighing SBS, EVA and compatilizer according to the amount, adding the SBS, the EVA and the compatilizer into the asphalt modifier, and continuously stirring uniformly to obtain an asphalt primary product;
and 4, shearing and grinding the primary asphalt product uniformly, cooling to 160-180 ℃, adding a stabilizer, and continuously stirring and swelling until the mixture is uniform to obtain the high-temperature-resistant asphalt.
The invention has the beneficial effects that:
1. the high-temperature resistant asphalt is prepared, and SBS and EVA are added, so that the asphalt has good anti-seismic performance; the modifier is added, so that the temperature resistance of the asphalt is improved; the stabilizer is added, so that the aging resistance of the asphalt is improved. In addition, the preparation method for preparing the high-temperature resistant asphalt is simple and convenient to operate, does not need too much labor cost, and is suitable for industrial application.
2. The compatilizer is prepared by mixing natural phenol, phenolic resin and a solvent, can effectively control the dispersion uniformity of asphalt in the production process, enables the compatibility of an asphalt matrix and other raw materials to be better after compounding, and does not generate a layering phenomenon before curing or even after being placed for a period of time, thereby being more beneficial to the overall stability of the asphalt.
3. The modifier used in the invention is modified silicon-based microspheres, the modified silicon-based microspheres are obtained by firstly preparing silicon-based microspheres and then carrying out graft polymerization on the microspheres by using organic tantalum, the modifier is combined with organic matters through reaction under the action of palladium dichloride by utilizing the high stability of tantalum base to obtain the organic tantalum, and then the organic tantalum and the silicon-based microspheres with hydrocarbon groups on two sides can form stable graft polymers to finally obtain the modified silicon-based microspheres. During preparation, the modified silicon-based microspheres are used for carrying out fusion modification on the asphalt, and the modified silicon-based microspheres have organic groups, so that the modified silicon-based microspheres can be well combined with the asphalt, and the obtained modified asphalt can be better fused with subsequent additives.
4. The invention also adds a stabilizer which is the combination of organic vanadium and selenic acid, and then adds bismuth element to form bismuth-doped vanadium selenate. One end point of the tetrahedral configuration of the selenate is a long lone pair electron, and the other three end points can be connected with other atoms, so that the polar material without the symmetric center is formed by combining with organic vanadium, and the polar material has a more excellent crystal structure. However, selenate has stronger oxidizability and is still not stable enough to a certain extent, so that the bismuth element is added to optimize the structure of the selenate, and finally the obtained bismuth element-doped vanadium selenate has a stable crystal structure, and can better prolong the aging time point of the asphalt when being added into the asphalt as a stabilizer, so that the asphalt material can be used for a longer time.
Detailed Description
The invention is further described with reference to the following examples.
Example 1
The formula of the high-temperature resistant asphalt comprises the following components in parts by weight:
100 parts of matrix asphalt, 5 parts of SBS, 6 parts of EVA, 4 parts of compatilizer, 5 parts of modifier and 3 parts of stabilizer.
The matrix asphalt is 70# or 90# heavy-traffic asphalt.
SBS is a linear styrene-butadiene block copolymer.
The content of vinyl acetate in the EVA is 20-50%.
The compatilizer is prepared by mixing natural phenol, phenolic resin and a solvent; wherein the mass ratio of the natural phenol to the phenolic resin to the solvent is 1: 0.05-0.1: 0.1-0.5.
The natural phenol is one or more of anthocyan natural phenol, flavonoid natural phenol, phenolic acid natural phenol and resveratrol natural phenol; the solvent is one of benzene, toluene, xylene and trimethylbenzene.
The modifier is modified silicon-based microspheres.
The stabilizer is selenate, in particular to metal bismuth-doped selenate.
The modified silicon-based microspheres are obtained by graft polymerization of organic tantalum and silicon-based microspheres.
The preparation method of the modified silicon-based microspheres comprises the following steps:
s1, weighing tantalum acetate, adding the tantalum acetate into N, N-dimethylformamide, stirring until the tantalum acetate is dissolved, adding palladium dichloride, stirring until the palladium dichloride is uniformly stirred, heating to 60-70 ℃, stirring at the speed of 200-300 rpm for 5-10 hours, and cooling to room temperature to obtain an organic tantalum solution;
wherein the mass ratio of the tantalum acetate to the palladium dichloride to the N, N-dimethylformamide is 1: 0.05-0.1: 10-15;
s2, weighing gamma- (methacryloyloxy) propyl trimethoxy silane, adding the gamma- (methacryloyloxy) propyl trimethoxy silane into deionized water, stirring at the speed of 500-1000 rpm for 0.5-3 h, then dropwise adding ammonia water with the mass concentration of 20%, continuously stirring at room temperature for 1-3 h, filtering to obtain a solid, washing with acetone for three times, then washing with deionized water for three times, and drying in vacuum to obtain the silicon-based microspheres;
wherein the mass ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the deionized water is 1: 15-20; the solid-to-liquid ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the ammonia water is 1: 0.2-0.5;
s3, weighing the silicon-based microspheres, adding the silicon-based microspheres into the organic tantalum solution, ultrasonically dispersing the silicon-based microspheres uniformly, adding 2,2' -azobis (2, 4-dimethylvaleronitrile), stirring the mixture for 3-5 hours in a water bath at the temperature of 60-80 ℃, cooling the mixture to room temperature, ultrasonically degassing, filtering the mixture to obtain a solid, washing the solid with acetone for three times, and drying the solid in vacuum to obtain modified silicon-based microspheres;
wherein the mass ratio of the 2,2' -azobis (2, 4-dimethylvaleronitrile) to the silicon-based microspheres is 1: 0.01-0.1; the solid-liquid ratio of the silicon-based microspheres to the organic tantalum solution is 1: 10-20.
The preparation method of the stabilizer comprises the following steps:
s1, weighing vanadyl oxalate, adding the vanadyl oxalate into deionized water, and stirring until the vanadyl oxalate is completely dissolved to obtain a vanadyl oxalate solution; adding bismuth chloride into the vanadyl oxalate solution, placing the solution in a water bath at 60-80 ℃, stirring for reaction for 2-5 h, and cooling to room temperature to obtain a mixed solution;
wherein the solid-to-liquid ratio of vanadyl oxalate to deionized water is 1: 5-20; the solid-to-liquid ratio of the bismuth chloride to the vanadyl oxalate solution is 1: 50-80;
s2, adding selenious acid into the liquid before mixing, stirring uniformly, adding hydrogen peroxide, stirring uniformly again, pouring into a reaction kettle with a polytetrafluoroethylene lining, heating to 80-100 ℃, reacting for 3-6 hours, filtering to obtain a solid, and washing with deionized water for three times to obtain bismuth-doped vanadium selenate;
wherein the solid-to-liquid ratio of the selenious acid to the liquid before mixing is 1: 10-30; the volume ratio of the hydrogen peroxide to the liquid before mixing is 1: 80-120.
Another object of the present invention is to provide a method for preparing high temperature resistant asphalt, comprising:
step 1, weighing the matrix asphalt according to the amount, adding the matrix asphalt into a stirrer, heating to 180-200 ℃, and stirring to a swelling state to obtain an asphalt swelling substance;
step 2, weighing a modifier according to the amount, adding the modifier into the asphalt swelling material, and stirring the mixture uniformly to obtain an asphalt modified material;
step 3, weighing SBS, EVA and compatilizer according to the amount, adding the SBS, the EVA and the compatilizer into the asphalt modifier, and continuously stirring uniformly to obtain an asphalt primary product;
and 4, shearing and grinding the primary asphalt product uniformly, cooling to 160-180 ℃, adding a stabilizer, and continuously stirring and swelling until the mixture is uniform to obtain the high-temperature-resistant asphalt.
Example 2
The formula of the high-temperature resistant asphalt comprises the following components in parts by weight:
100 parts of matrix asphalt, 3 parts of SBS, 2 parts of EVA, 3 parts of compatilizer, 2 parts of modifier and 1 part of stabilizer.
The matrix asphalt is 70# or 90# heavy-traffic asphalt.
SBS is a linear styrene-butadiene block copolymer.
The content of vinyl acetate in the EVA is 20-50%.
The compatilizer is prepared by mixing natural phenol, phenolic resin and a solvent; wherein the mass ratio of the natural phenol to the phenolic resin to the solvent is 1: 0.05-0.1: 0.1-0.5.
The natural phenol is one or more of anthocyan natural phenol, flavonoid natural phenol, phenolic acid natural phenol and resveratrol natural phenol; the solvent is one of benzene, toluene, xylene and trimethylbenzene.
The modifier is modified silicon-based microspheres.
The stabilizer is selenate, in particular to metal bismuth-doped selenate.
The modified silicon-based microspheres are obtained by graft polymerization of organic tantalum and silicon-based microspheres.
The preparation method of the modified silicon-based microspheres comprises the following steps:
s1, weighing tantalum acetate, adding the tantalum acetate into N, N-dimethylformamide, stirring until the tantalum acetate is dissolved, adding palladium dichloride, stirring until the palladium dichloride is uniformly stirred, heating to 60-70 ℃, stirring at the speed of 200-300 rpm for 5-10 hours, and cooling to room temperature to obtain an organic tantalum solution;
wherein the mass ratio of the tantalum acetate to the palladium dichloride to the N, N-dimethylformamide is 1: 0.05-0.1: 10-15;
s2, weighing gamma- (methacryloyloxy) propyl trimethoxy silane, adding the gamma- (methacryloyloxy) propyl trimethoxy silane into deionized water, stirring at the speed of 500-1000 rpm for 0.5-3 h, then dropwise adding ammonia water with the mass concentration of 20%, continuously stirring at room temperature for 1-3 h, filtering to obtain a solid, washing with acetone for three times, then washing with deionized water for three times, and drying in vacuum to obtain the silicon-based microspheres;
wherein the mass ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the deionized water is 1: 15-20; the solid-to-liquid ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the ammonia water is 1: 0.2-0.5;
s3, weighing the silicon-based microspheres, adding the silicon-based microspheres into the organic tantalum solution, ultrasonically dispersing the silicon-based microspheres uniformly, adding 2,2' -azobis (2, 4-dimethylvaleronitrile), stirring the mixture for 3-5 hours in a water bath at the temperature of 60-80 ℃, cooling the mixture to room temperature, ultrasonically degassing, filtering the mixture to obtain a solid, washing the solid with acetone for three times, and drying the solid in vacuum to obtain modified silicon-based microspheres;
wherein the mass ratio of the 2,2' -azobis (2, 4-dimethylvaleronitrile) to the silicon-based microspheres is 1: 0.01-0.1; the solid-liquid ratio of the silicon-based microspheres to the organic tantalum solution is 1: 10-20.
The preparation method of the stabilizer comprises the following steps:
s1, weighing vanadyl oxalate, adding the vanadyl oxalate into deionized water, and stirring until the vanadyl oxalate is completely dissolved to obtain a vanadyl oxalate solution; adding bismuth chloride into the vanadyl oxalate solution, placing the solution in a water bath at 60-80 ℃, stirring for reaction for 2-5 h, and cooling to room temperature to obtain a mixed solution;
wherein the solid-to-liquid ratio of vanadyl oxalate to deionized water is 1: 5-20; the solid-to-liquid ratio of the bismuth chloride to the vanadyl oxalate solution is 1: 50-80;
s2, adding selenious acid into the liquid before mixing, stirring uniformly, adding hydrogen peroxide, stirring uniformly again, pouring into a reaction kettle with a polytetrafluoroethylene lining, heating to 80-100 ℃, reacting for 3-6 hours, filtering to obtain a solid, and washing with deionized water for three times to obtain bismuth-doped vanadium selenate;
wherein the solid-to-liquid ratio of the selenious acid to the liquid before mixing is 1: 10-30; the volume ratio of the hydrogen peroxide to the liquid before mixing is 1: 80-120.
Another object of the present invention is to provide a method for preparing high temperature resistant asphalt, comprising:
step 1, weighing the matrix asphalt according to the amount, adding the matrix asphalt into a stirrer, heating to 180-200 ℃, and stirring to a swelling state to obtain an asphalt swelling substance;
step 2, weighing a modifier according to the amount, adding the modifier into the asphalt swelling material, and stirring the mixture uniformly to obtain an asphalt modified material;
step 3, weighing SBS, EVA and compatilizer according to the amount, adding the SBS, the EVA and the compatilizer into the asphalt modifier, and continuously stirring uniformly to obtain an asphalt primary product;
and 4, shearing and grinding the primary asphalt product uniformly, cooling to 160-180 ℃, adding a stabilizer, and continuously stirring and swelling until the mixture is uniform to obtain the high-temperature-resistant asphalt.
Example 3
The formula of the high-temperature resistant asphalt comprises the following components in parts by weight:
100 parts of matrix asphalt, 8 parts of SBS, 10 parts of EVA, 6 parts of compatilizer, 8 parts of modifier and 5 parts of stabilizer.
The matrix asphalt is 70# or 90# heavy-traffic asphalt.
SBS is a linear styrene-butadiene block copolymer.
The content of vinyl acetate in the EVA is 20-50%.
The compatilizer is prepared by mixing natural phenol, phenolic resin and a solvent; wherein the mass ratio of the natural phenol to the phenolic resin to the solvent is 1: 0.05-0.1: 0.1-0.5.
The natural phenol is one or more of anthocyan natural phenol, flavonoid natural phenol, phenolic acid natural phenol and resveratrol natural phenol; the solvent is one of benzene, toluene, xylene and trimethylbenzene.
The modifier is modified silicon-based microspheres.
The stabilizer is selenate, in particular to metal bismuth-doped selenate.
The modified silicon-based microspheres are obtained by graft polymerization of organic tantalum and silicon-based microspheres.
The preparation method of the modified silicon-based microspheres comprises the following steps:
s1, weighing tantalum acetate, adding the tantalum acetate into N, N-dimethylformamide, stirring until the tantalum acetate is dissolved, adding palladium dichloride, stirring until the palladium dichloride is uniformly stirred, heating to 60-70 ℃, stirring at the speed of 200-300 rpm for 5-10 hours, and cooling to room temperature to obtain an organic tantalum solution;
wherein the mass ratio of the tantalum acetate to the palladium dichloride to the N, N-dimethylformamide is 1: 0.05-0.1: 10-15;
s2, weighing gamma- (methacryloyloxy) propyl trimethoxy silane, adding the gamma- (methacryloyloxy) propyl trimethoxy silane into deionized water, stirring at the speed of 500-1000 rpm for 0.5-3 h, then dropwise adding ammonia water with the mass concentration of 20%, continuously stirring at room temperature for 1-3 h, filtering to obtain a solid, washing with acetone for three times, then washing with deionized water for three times, and drying in vacuum to obtain the silicon-based microspheres;
wherein the mass ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the deionized water is 1: 15-20; the solid-to-liquid ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the ammonia water is 1: 0.2-0.5;
s3, weighing the silicon-based microspheres, adding the silicon-based microspheres into the organic tantalum solution, ultrasonically dispersing the silicon-based microspheres uniformly, adding 2,2' -azobis (2, 4-dimethylvaleronitrile), stirring the mixture for 3-5 hours in a water bath at the temperature of 60-80 ℃, cooling the mixture to room temperature, ultrasonically degassing, filtering the mixture to obtain a solid, washing the solid with acetone for three times, and drying the solid in vacuum to obtain modified silicon-based microspheres;
wherein the mass ratio of the 2,2' -azobis (2, 4-dimethylvaleronitrile) to the silicon-based microspheres is 1: 0.01-0.1; the solid-liquid ratio of the silicon-based microspheres to the organic tantalum solution is 1: 10-20.
The preparation method of the stabilizer comprises the following steps:
s1, weighing vanadyl oxalate, adding the vanadyl oxalate into deionized water, and stirring until the vanadyl oxalate is completely dissolved to obtain a vanadyl oxalate solution; adding bismuth chloride into the vanadyl oxalate solution, placing the solution in a water bath at 60-80 ℃, stirring for reaction for 2-5 h, and cooling to room temperature to obtain a mixed solution;
wherein the solid-to-liquid ratio of vanadyl oxalate to deionized water is 1: 5-20; the solid-to-liquid ratio of the bismuth chloride to the vanadyl oxalate solution is 1: 50-80;
s2, adding selenious acid into the liquid before mixing, stirring uniformly, adding hydrogen peroxide, stirring uniformly again, pouring into a reaction kettle with a polytetrafluoroethylene lining, heating to 80-100 ℃, reacting for 3-6 hours, filtering to obtain a solid, and washing with deionized water for three times to obtain bismuth-doped vanadium selenate;
wherein the solid-to-liquid ratio of the selenious acid to the liquid before mixing is 1: 10-30; the volume ratio of the hydrogen peroxide to the liquid before mixing is 1: 80-120.
Another object of the present invention is to provide a method for preparing high temperature resistant asphalt, comprising:
step 1, weighing the matrix asphalt according to the amount, adding the matrix asphalt into a stirrer, heating to 180-200 ℃, and stirring to a swelling state to obtain an asphalt swelling substance;
step 2, weighing a modifier according to the amount, adding the modifier into the asphalt swelling material, and stirring the mixture uniformly to obtain an asphalt modified material;
step 3, weighing SBS, EVA and compatilizer according to the amount, adding the SBS, the EVA and the compatilizer into the asphalt modifier, and continuously stirring uniformly to obtain an asphalt primary product;
and 4, shearing and grinding the primary asphalt product uniformly, cooling to 160-180 ℃, adding a stabilizer, and continuously stirring and swelling until the mixture is uniform to obtain the high-temperature-resistant asphalt.
Comparative example
The formula of the high-temperature resistant asphalt comprises the following components in parts by weight:
100 parts of matrix asphalt, 5 parts of SBS, 6 parts of EVA, 4 parts of compatilizer, 5 parts of modifier and 3 parts of stabilizer.
The matrix asphalt is 70# heavy traffic asphalt.
The SBS is a linear styrene-butadiene block copolymer.
The EVA has a vinyl acetate content of 30%.
The compatilizer is naphthenic base rubber oil.
The modifier is silicon dioxide microspheres.
The stabilizer is sodium hydroxymethyl cellulose.
A preparation method using the high-temperature resistant asphalt formula comprises the following steps:
step 1, weighing the matrix asphalt according to the amount, adding the matrix asphalt into a stirrer, heating to 180-200 ℃, and stirring to a swelling state to obtain an asphalt swelling substance;
step 2, weighing a modifier according to the amount, adding the modifier into the asphalt swelling material, and stirring the mixture uniformly to obtain an asphalt modified material;
step 3, weighing SBS, EVA and compatilizer according to the amount, adding the SBS, the EVA and the compatilizer into the asphalt modifier, and continuously stirring uniformly to obtain an asphalt primary product;
and 4, shearing and grinding the primary asphalt product uniformly, cooling to 160-180 ℃, adding a stabilizer, and continuously stirring and swelling until the mixture is uniform to obtain the high-temperature-resistant asphalt.
In order to more clearly illustrate the invention, the performance of the high temperature resistant asphalt prepared in the embodiments 1 to 3 and the comparative example of the invention is tested, and the results are shown in table 1.
Wherein, the ductility at 5 ℃, the penetration, the softening point and the storage stability (precipitation rate) are detected according to JTG/F40-2004 highway asphalt pavement construction technical specifications.
High temperature resistance: the asphalt in examples 1 to 3 and comparative example was dried and then placed in a high temperature environment of 80 ℃ for 24 hours to observe whether deformation occurred.
Low temperature resistance: the asphalt in examples 1-3 and comparative example was dried and then placed in an environment of-15 ℃ for 24 hours to observe the surface cracking.
TABLE 1 asphalt Performance test
| Example 1 | Example 2 | Example 3 | Comparative example | |
| 5 ℃ ductility (cm) | 65 | 62 | 68 | 25 |
| Penetration (dmm) at 25 ℃ | 46 | 52 | 49 | 58 |
| Precipitation rate (5 days) | No precipitation | No precipitation | No precipitation | ＞5％ |
| Softening Point (. degree. C.) | 92.5 | 89.7 | 93.1 | 47.8 |
| High temperature resistance | No cracking and deformation | No cracking and deformation | No cracking and deformation | The deformation rate is 40% |
| Low temperature resistance | No cracking and deformation | No cracking and deformation | No cracking and deformation | The cracking rate is 50 percent |
As can be seen from Table 1, compared with comparative examples, the asphalt prepared in the examples 1-3 of the present invention has the advantages of standard detection results, good moldability, low precipitation rate, resistance to high temperature of 80 ℃ and low temperature of-15 ℃, and suitability for popularization and use.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The high-temperature-resistant asphalt is characterized in that the asphalt comprises the following components in parts by weight:
100 parts of matrix asphalt, 3-8 parts of SBS, 2-10 parts of EVA, 3-6 parts of compatilizer, 2-8 parts of modifier and 1-5 parts of stabilizer.
2. The high-temperature resistant asphalt according to claim 1, wherein the base asphalt is 70# or 90# heavy-duty asphalt.
3. The high temperature resistant asphalt of claim 1, wherein the SBS is a linear styrene-butadiene block copolymer.
4. The high-temperature resistant asphalt according to claim 1, wherein the content of vinyl acetate in the EVA is 20-50%.
5. The high-temperature resistant asphalt according to claim 1, wherein the compatilizer is prepared by mixing natural phenol, phenolic resin and a solvent; wherein the mass ratio of the natural phenol to the phenolic resin to the solvent is 1: 0.05-0.1: 0.1-0.5; the natural phenol is one or more of anthocyan natural phenol, flavonoid natural phenol, phenolic acid natural phenol and resveratrol natural phenol; the solvent is one of benzene, toluene, xylene and trimethylbenzene.
6. The high-temperature resistant asphalt according to claim 1, wherein the modifier is modified silicon-based microspheres; the modified silicon-based microspheres are obtained by graft polymerization of organic tantalum and silicon-based microspheres.
7. The high-temperature resistant asphalt according to claim 1, wherein the stabilizer is selenate, in particular metal bismuth-doped vanadyl selenate.
8. The high-temperature-resistant asphalt according to claim 6, wherein the preparation method of the modified silicon-based microspheres comprises the following steps:
s1, weighing tantalum acetate, adding the tantalum acetate into N, N-dimethylformamide, stirring until the tantalum acetate is dissolved, adding palladium dichloride, stirring until the palladium dichloride is uniformly stirred, heating to 60-70 ℃, stirring at the speed of 200-300 rpm for 5-10 hours, and cooling to room temperature to obtain an organic tantalum solution;
wherein the mass ratio of the tantalum acetate to the palladium dichloride to the N, N-dimethylformamide is 1: 0.05-0.1: 10-15;
s2, weighing gamma- (methacryloyloxy) propyl trimethoxy silane, adding the gamma- (methacryloyloxy) propyl trimethoxy silane into deionized water, stirring at the speed of 500-1000 rpm for 0.5-3 h, then dropwise adding ammonia water with the mass concentration of 20%, continuously stirring at room temperature for 1-3 h, filtering to obtain a solid, washing with acetone for three times, then washing with deionized water for three times, and drying in vacuum to obtain the silicon-based microspheres;
wherein the mass ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the deionized water is 1: 15-20; the solid-to-liquid ratio of the gamma- (methacryloyloxy) propyl trimethoxy silane to the ammonia water is 1: 0.2-0.5;
s3, weighing the silicon-based microspheres, adding the silicon-based microspheres into the organic tantalum solution, ultrasonically dispersing the silicon-based microspheres uniformly, adding 2,2' -azobis (2, 4-dimethylvaleronitrile), stirring the mixture for 3-5 hours in a water bath at the temperature of 60-80 ℃, cooling the mixture to room temperature, ultrasonically degassing, filtering the mixture to obtain a solid, washing the solid with acetone for three times, and drying the solid in vacuum to obtain modified silicon-based microspheres;
wherein the mass ratio of the 2,2' -azobis (2, 4-dimethylvaleronitrile) to the silicon-based microspheres is 1: 0.01-0.1; the solid-liquid ratio of the silicon-based microspheres to the organic tantalum solution is 1: 10-20.
9. The high-temperature resistant asphalt according to claim 7, wherein the preparation method of the stabilizer comprises the following steps:
s1, weighing vanadyl oxalate, adding the vanadyl oxalate into deionized water, and stirring until the vanadyl oxalate is completely dissolved to obtain a vanadyl oxalate solution; adding bismuth chloride into the vanadyl oxalate solution, placing the solution in a water bath at 60-80 ℃, stirring for reaction for 2-5 h, and cooling to room temperature to obtain a mixed solution;
wherein the solid-to-liquid ratio of vanadyl oxalate to deionized water is 1: 5-20; the solid-to-liquid ratio of the bismuth chloride to the vanadyl oxalate solution is 1: 50-80;
s2, adding selenious acid into the liquid before mixing, stirring uniformly, adding hydrogen peroxide, stirring uniformly again, pouring into a reaction kettle with a polytetrafluoroethylene lining, heating to 80-100 ℃, reacting for 3-6 hours, filtering to obtain a solid, and washing with deionized water for three times to obtain bismuth-doped vanadium selenate;
wherein the solid-to-liquid ratio of the selenious acid to the liquid before mixing is 1: 10-30; the volume ratio of the hydrogen peroxide to the liquid before mixing is 1: 80-120.
10. A preparation method of high-temperature resistant asphalt is characterized by comprising the following steps of:
step 1, weighing the matrix asphalt according to the amount, adding the matrix asphalt into a stirrer, heating to 180-200 ℃, and stirring to a swelling state to obtain an asphalt swelling substance;
step 2, weighing a modifier according to the amount, adding the modifier into the asphalt swelling material, and stirring the mixture uniformly to obtain an asphalt modified material;
step 3, weighing SBS, EVA and compatilizer according to the amount, adding the SBS, the EVA and the compatilizer into the asphalt modifier, and continuously stirring uniformly to obtain an asphalt primary product;
and 4, shearing and grinding the primary asphalt product uniformly, cooling to 160-180 ℃, adding a stabilizer, and continuously stirring and swelling until the mixture is uniform to obtain the high-temperature-resistant asphalt.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113736272A (en) * | 2021-09-04 | 2021-12-03 | 江苏蛙鸣建筑装饰科技有限公司 | High-temperature-resistant road asphalt and preparation method thereof |
| CN114437749A (en) * | 2020-11-02 | 2022-05-06 | 中国石油化工股份有限公司 | Preparation method of amino-enriched asphalt and microspheres thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114437749A (en) * | 2020-11-02 | 2022-05-06 | 中国石油化工股份有限公司 | Preparation method of amino-enriched asphalt and microspheres thereof |
| CN114437749B (en) * | 2020-11-02 | 2023-04-11 | 中国石油化工股份有限公司 | Amino-enriched asphalt and preparation method of microspheres thereof |
| CN113736272A (en) * | 2021-09-04 | 2021-12-03 | 江苏蛙鸣建筑装饰科技有限公司 | High-temperature-resistant road asphalt and preparation method thereof |
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